3BHE024855R0101培訓教程，ABB控制卡件
調(diào)試連接器（J2）190針連接器（MVME2700基板上的J2）提供訪問權(quán)限到處理器總線（MPU總線）和一些網(wǎng)橋/內(nèi)存控制器信號。它可以用于調(diào)試目的。引腳分配為如下表所示。軟盤/LED連接器（J3）一個50針高密度連接器（MVME2700基板上的J3）提供基板和可選外部接口之間的接口軟盤驅(qū)動器。
3BHE024855R0101培訓教程除了磁盤驅(qū)動器控制信號外，還有一組16個線路可用于驅(qū)動外部LED陣列PCI擴展連接器（J4）MVME2700具有將PMC載波板堆疊在用于額外PCI擴展的基板。114針接頭（J4位于基板）提供MVME2700和載體之間的接口板四個64針連接器（MVME2700上的J11/12/13/14）為基板和可選PCI夾層卡之間的接口（PMC）。引腳分配在接下來兩頁的表格中列出。注：根據(jù)IEEE標準，每個PMC可以獲得最大7.5W的功率P1386.1規(guī)范。這可以與任何單個PMC電壓一起使用（+3.3V、+5V或+12V）或任何組合，只要總數(shù)為每個PMC插槽不超過7.5W。1下表總結(jié)了特定于配置用于MVME712M的MVME2700模塊過渡模塊。
VMEbus連接器P2兩個160針接頭（P1和P2）提供MVME2700和VMEbus。P1為24位尋址和16位數(shù)據(jù)提供電源和VME信號。其引腳分配由VMEbus規(guī)范設(shè)置。P2行A、C、Z和D向MVME712M過渡模塊。P2 B行為MVME2700提供電源，具有上面的八條VMEbus地址線，以及額外的16條VMEbus數(shù)據(jù)線。MVME712M輸入/輸出中P2的引腳分配配置如表4-10所示。串行端口1-4MVME2700提供異步（端口1和2）和同步/異步（端口3和4）串行連接，
使用四個EIA-232-D DB25連接器（J7-J10）實現(xiàn)。這些連接器位于MVME712M過渡段的前面板上
單元
Debug Connector (J2)
A 190-pin connector (J2 on the MVME2700 base board) provides access
to the processor bus (MPU bus) and some bridge/memory controller
signals. It can be used for debugging purposes. The pin assignments are
listed in the following table.Floppy/LED Connector (J3)
A 50-pin high-density connector (J3 on the MVME2700 base board)
supplies the interface between the base board and an optional external
floppy disk drive. In addition to the disk drive control signals, a set of 16
lines is available to drive an external LED arrayPCI Expansion Connector (J4)
The MVME2700 has provision for stacking a PMC carrier board on the
base board for additional PCI expansion. A 114-pin connector (J4 on the
base board) supplies the interface between the MVME2700 and the carrier
board.Four 64-pin connectors (J11/12/13/14 on the MVME2700) supply the
interface between the base board and an optional PCI mezzanine card
(PMC). The pin assignments are listed in the tables on the next two pages.
Note Each PMC can draw a maximum of 7.5W of power, per the IEEE
P1386.1 Specification. This can be with any single PMC voltage
(+3.3V, +5V, or +12V) or any combination, as long as the total
does not exceed 7.5W per PMC slot.1The next tables summarize the pin assignments of connectors specific to
MVME2700 modules that are configured for use with MVME712M
transition modules.
VMEbus Connector P2
Two 160-pin connectors (P1 and P2) supply the interface between the
MVME2700 and the VMEbus.
P1 provides power and VME signals for 24-bit addressing and 16-bit data.
Its pin assignments are set by the VMEbus specification.
P2 rows A, C, Z, and D provide power and interface signals to the
MVME712M transition module. P2 row B supplies the MVME2700 with
power, with the upper eight VMEbus address lines, and with an additional
16 VMEbus data lines. The pin assignments for P2 in the MVME712M I/O
configuration are listed in Table 4-10.Serial Ports 1-4
The MVME2700 provides both asynchronous (ports 1 and 2) and
synchronous/asynchronous (ports 3 and 4) serial connections,
implemented with four EIA-232-D DB25 connectors (J7-J10). These
connectors are located on the front panel of the MVME712M transition
module.
